string BuildCacheKey(CacheMeta cacheMeta, IParameterCollection inputs)
{
StringBuilder cacheKeyBuilder = new StringBuilder();
cacheKeyBuilder.Append(cacheMeta.Name);
for (int i = 0; i < inputs.Count; i++)
{
ParameterInfo parameterInfo = inputs.GetParameterInfo(0);
PropertyInfo[] propertyInfos = cacheMeta.GetCacheKey(parameterInfo);
if (propertyInfos != null)
{
if (propertyInfos.Length == 0)
{
cacheKeyBuilder.Append(";");
cacheKeyBuilder.Append(parameterInfo.Name).Append("=").Append(inputs[i]);
}
else
{
foreach (PropertyInfo propertyInfo in propertyInfos)
{
cacheKeyBuilder.Append(";");
cacheKeyBuilder.Append(propertyInfo.Name).Append("=").Append(propertyInfo.GetValue(
inputs[i], null));
}
}
}
}
return(cacheKeyBuilder.ToString().Replace(" ", "").ToUpper());
}
public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
{
CacheMeta cacheMeta = cacheMetaLoader.Load(input.MethodBase);
if (cacheMeta == null)
{
logger.Error("CacheMeta is null", new ArgumentNullException());
return(getNext()(input, getNext));
}
CacheMode cacheMode = cacheMeta.CacheMode;
ICacheHelper cacheHelper = ChooseCacheHelper(cacheMode);
if (cacheHelper == null)
{
logger.Error(cacheMode + "cache type not found", new CacheModeNotFoundException());
return(getNext()(input, getNext));
}
cacheHelper = new CacheProxy(cacheMode, cacheHelper);
CacheAction cacheAction = cacheMeta.CacheAction;
string cacheKey = BuildCacheKey(cacheMeta, input.Arguments);
string groupName = cacheMeta.CacheGroup;
string cacheType = cacheHelper.GetType().Name;
logger.Debug(string.Format("Choose {0} as cache helper, cacheGroup={1}, cacheKey={2}", cacheType, cacheMeta.CacheGroup, cacheKey));
if (cacheAction == CacheAction.FETCH)
{
object obj;
try
{
obj = cacheHelper.Get(groupName, cacheKey);
}
catch (Exception ex)
{
logger.Error("Get cache failed, cacheType=" + cacheType, ex);
return(getNext()(input, getNext));
}
if (obj != null)
{
logger.Debug(string.Format("Hitting cache, cacheGroup={0}, cacheKey={1}", groupName, cacheKey));
return(input.CreateMethodReturn(obj, null));
}
else
{
IMethodReturn methodReturn = getNext()(input, getNext);
if (methodReturn.Exception == null && methodReturn.ReturnValue != null)
{
cacheHelper.Add(groupName, cacheKey, methodReturn.ReturnValue);
logger.Info(string.Format("Adding to cache, cacheGroup={0}, cacheKey={1}", groupName, cacheKey));
}
return(methodReturn);
}
}
else if (cacheAction == CacheAction.UPDATE)
{
object cacheValue = GetCacheValue(input.Arguments);
if (cacheValue != null)
{
cacheHelper.Update(groupName, cacheKey, cacheValue);
logger.Info(string.Format("Update cache, cacheGroup={0}, cacheKey={1}", groupName, cacheKey));
}
return(getNext()(input, getNext));
}
else if (cacheAction == CacheAction.CLEAR)
{
IMethodReturn methodReturn = getNext()(input, getNext);
cacheHelper.Remove(groupName, cacheKey);
logger.Info(string.Format("Remove cache, cacheGroup={0}, cacheKey={1}", groupName, cacheKey));
return(methodReturn);
}
return(getNext()(input, getNext));
}
